コード例 #1
0
        protected override bool ReadFile(BinaryReader r)
        {
            var length = (int)r.BaseStream.Length;

            if (length < 8)
            {
                throw new InvalidDataException("File is too short to contain even a header", null);
            }

            byte[] bytes = r.ReadBytes((int)length);

            var head = new ArraySegment <byte>(bytes, 0, 8);

            if (!Header.Read(head))
            {
                throw new InvalidDataException("File does not contain a valid header", null);
            }
            if (bytes.Length < (8 + (Header.FrameCount * 24)))
            {
                throw new InvalidDataException("File is too short to contain enough frame headers", null);
            }

            for (var i = 0; i < Header.FrameCount; ++i)
            {
                var seg = new ArraySegment <byte>(bytes, 8 + (i * 24), 24);
                var fh  = new FrameHeader();
                if (fh.Read(seg))
                {
                    FrameHeaders.Add(fh);
                }
                else
                {
                    throw new InvalidDataException(String.Format("File does not contain a valid frame header #{0}", i), null);
                }
            }

            foreach (var h in FrameHeaders)
            {
                if (h.Offset > length)
                {
                    throw new InvalidDataException(String.Format("File is too short to contain a valid frame (at {0} bytes)", h.Offset), null);
                }
                var len = (int)(length - h.Offset);
                var seg = new ArraySegment <byte>(bytes, (int)h.Offset, len);
                if (!h.ProcessBytes(seg))
                {
                    throw new InvalidDataException(String.Format("File does not contain a valid frame (at {0} bytes)", h.Offset), null);
                }
            }

            return(true);
        }
コード例 #2
0
ファイル: SHP.cs プロジェクト: DCoderLT/cncpp
        protected override bool ReadFile(BinaryReader r)
        {
            var length = (int)r.BaseStream.Length;
            if (length < 8) {
                throw new InvalidDataException("File is too short to contain even a header", null);
            }

            byte[] bytes = r.ReadBytes((int)length);

            var head = new ArraySegment<byte>(bytes, 0, 8);

            if (!Header.Read(head)) {
                throw new InvalidDataException("File does not contain a valid header", null);
            }
            if (bytes.Length < (8 + (Header.FrameCount * 24))) {
                throw new InvalidDataException("File is too short to contain enough frame headers", null);
            }

            for (var i = 0; i < Header.FrameCount; ++i) {
                var seg = new ArraySegment<byte>(bytes, 8 + (i * 24), 24);
                var fh = new FrameHeader();
                if (fh.Read(seg)) {
                    FrameHeaders.Add(fh);
                } else {
                    throw new InvalidDataException(String.Format("File does not contain a valid frame header #{0}", i), null);
                }
            }

            foreach (var h in FrameHeaders) {
                if (h.Offset > length) {
                    throw new InvalidDataException(String.Format("File is too short to contain a valid frame (at {0} bytes)", h.Offset), null);
                }
                var len = (int)(length - h.Offset);
                var seg = new ArraySegment<byte>(bytes, (int)h.Offset, len);
                if (!h.ProcessBytes(seg)) {
                    throw new InvalidDataException(String.Format("File does not contain a valid frame (at {0} bytes)", h.Offset), null);
                }
            }

            return true;
        }